From: yu chunyan (yuchunyan@hotmail.com)
Date: Tue Aug 19 2003 - 18:14:11 GMT-3
In my memory, I think "ip default-network" is just for rip anf eigrp. it
tells other rip and eigrp routers that I have a default route, it does not
mean the router itself really has a default route, the way just like
"default information-originate" in ospf. the ip default-network must point
to a major network.
please correct me if I am wrong or miss some points.
Bin Lei
>From: Ken.Farrington@barclayscapital.com
>Reply-To: Ken.Farrington@barclayscapital.com
>To: TR126568@exchange.DAYTONOH.NCR.com, ccielab@groupstudy.com
>Subject: RE: OSPF default-network (really sorry for this)
>Date: Tue, 19 Aug 2003 19:30:21 +0100
>
>Hi Tim, tried this and the ip default-network command is classful so this
>just adds a static route and you do not get a default-candidate.
>
>thx fella for the input anyway, much welcomed
>
>still got me baffeled thou ....
>
>-----Original Message-----
>From: Reisner, Tim [mailto:TR126568@exchange.DAYTONOH.NCR.com]
>Sent: 19 August 2003 19:25
>To: Ken.Farrington@barclayscapital.com; ccielab@groupstudy.com
>Subject: RE: OSPF default-network (really sorry for this)
>
>
>Try
>
>ip default-network 128.10.1.0
>
>
>-----Original Message-----
>From: Ken.Farrington@barclayscapital.com
>[mailto:Ken.Farrington@barclayscapital.com]
>Sent: Tuesday, August 19, 2003 12:02 PM
>To: ccielab@groupstudy.com
>Subject: OSPF default-network (really sorry for this)
>
>
>Guys,
>
>This is one of those moments where I am about to throw the CCIE Pratical
>Studies book out of my window and go down the PUB! In the book, one of the
>tasks is to inject a default network into the OSPF domain without using
>statics.
>
>So, I do as the book tells me and on my router I add a the following
>
>!
>router ospf 2002
> router-id 192.168.200.200
> log-adjacency-changes
> area 10 authentication
> area 10 stub no-summary
> network 128.10.1.0 0.0.0.255 area 0
> network 172.16.1.0 0.0.0.255 area 0
> network 172.16.2.4 0.0.0.3 area 10
> neighbor 172.16.1.6
> neighbor 172.16.1.1
> default-information originate always <----ADDED
>!
>ip classless
>ip default-network 128.10.0.0 <----ADDED
>
>Please note there are no static routes on thsi router as instructed.
>
>The "default-information originate always" command injects a default route
>into every router into the OSPF domain excpet this router ccie-rtr7 with
>the
>command on. But this has a default network of 128.10.0.0 (refer to page
>810
>for the diag)
>
>I do a show ip route on this router and it has a candidate default of
>128.10.0.0 but no GOLR
>
>I do exactly as the book says, but as this does not set a GOLR on
>ccie-rtr7,
>anything for networks not in the routing table will just get dropped.
>Example of debug ip packet at end.
>
>
>Please help :((
>
>
>
>ccie-rtr7#sh ip route
>Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter
>area
> * - candidate default, U - per-user static route, o - ODR
> P - periodic downloaded static route
>
>Gateway of last resort is not set
>
> 172.16.0.0/16 is variably subnetted, 4 subnets, 3 masks
>O IA 172.16.10.0/28 [110/74] via 172.16.1.1, 00:19:06, Serial0/0.1
> [110/74] via 172.16.1.6, 00:19:06, Serial0/0.1
>C 172.16.2.4/30 is directly connected, Serial0/0.2
>C 172.16.1.0/24 is directly connected, Serial0/0.1
>O 172.16.3.0/24 [110/65] via 172.16.2.6, 00:21:06, Serial0/0.2
> * 128.10.0.0/24 is subnetted, 1 subnets
>C 128.10.1.0 is directly connected, Ethernet0/1
> 10.0.0.0/24 is subnetted, 1 subnets
>C 10.1.1.0 is directly connected, Ethernet0/0
>O E2 11.0.0.0/8 [110/20] via 172.16.1.1, 00:19:06, Serial0/0.1
> [110/20] via 172.16.1.6, 00:19:06, Serial0/0.1
> 12.0.0.0/24 is subnetted, 1 subnets
>C 12.1.1.0 is directly connected, BRI0/0
>ccie-rtr7#
>
>
>
>ccie-rtr7#ping 155.195.1.1
>Type escape sequence to abort.
>Sending 5, 100-byte ICMP Echos to 155.195.1.1, timeout is 2 seconds:
>
>01:09:37: IP: s=10.1.1.7 (local), d=155.195.1.1, len 100, unroutable
>01:09:39: IP: s=10.1.1.7 (local), d=155.195.1.1, len 100, unroutable.
>01:09:41: IP: s=10.1.1.7 (local), d=155.195.1.1, len 100, unroutable.
>01:09:43: IP: s=10.1.1.7 (local), d=155.195.1.1, len 100, unroutable
>01:09:45: IP: s=10.1.1.7 (local), d=155.195.1.1, len 100, unroutable.
>Success rate is 0 percent (0/5) ccie-rtr7#
>
>
>
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